[Bug 28106] radeon KMS causes hardware conflict/interference with Intel wifi and audio, crashes wireless

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Jul 13 13:56:58 PDT 2011


--- Comment #50 from Maciek Borzecki <maciek.borzecki at gmail.com> 2011-07-13 13:56:49 PDT ---
I played a bit with power_profile settings and it turns our that whenever
profile is set to high, mid, sound stuttering is pronounced. Yet, once set to
low, stuttering is gone (or unnoticeable).
If anyone wants to try (adjust path to suit your hardware):
echo low >  /sys/class/drm/card0/device/power_profile
Then the actual frequency can be verified by:
cat /sys/kernel/debug/dri/0/radeon_pm_info

Also dynpm power_method does not really work, there was another bug report
recenty that the frequency is never lowered if dynpm is used.

Additionally, given the recent fuss about pcie_aspm=force (and possible effect
on PCIe), sound stuttering is present regardless of the setting.

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